This happened to my truck too. 2019 Sierra Denali with 8,915 miles. The oil cooler line failed and they had to replace the engine because they did not like the noises coming from it from running low on oil. The truck broke down December 8th 2019 and finally got the call that it was done today, January 16 2020. In the process of repair the multi fuse blew and the starter burnt out. Hopefully it was not as bad for you guys.